Julian Chen
Senior Software Engineer with 12+ years of experience building large-scale customer platforms, internal systems, and AI-enabled products at Microsoft, Twitter, and Hyatt.
About
Senior Software Engineer with 12+ years of experience building large-scale customer platforms, internal systems, and AI-enabled products at Microsoft, Twitter, and Hyatt.
Strong full-stack engineering background with deep hands-on expertise in React, Next.js, React Native, Node.js, Python, PHP, distributed APIs, and cloud-native delivery.
Proven track record modernizing complex systems, improving performance and reliability, and translating business-critical requirements into production software used at enterprise and consumer scale.
Brings strong technical judgment and end-to-end ownership across architecture, development, deployment, observability, testing, and cross-functional delivery in high-scale and regulated environments.
- 12 years' experience
- Joined March 2026
Industry experience
- Computers & Electronics
- Software & Internet
- Professional Services
- Travel & Hospitality
- Healthcare
- Media & Entertainment
- Other
More experts in Dublin, Ireland
Work experience· 6 roles
Architected Next.js/React-based guest-facing and internal apps with Node.js APIs, powering AI-enabled features across 1,000+ Hyatt properties. Implemented secure OAuth 2.0 and Azure AD B2C APIs, built ML-powered chatbots and recommendation engines, and established data pipelines for reservations and loyalty systems. Led CI/CD pipelines using GitHub Actions, Docker, and Kubernetes on AWS/Azure, delivering resilient, scalable guest experiences.
Delivered real-time recommendation and feed-ranking service using Node.js microservices and Python-based ML inference, improving targeted engagement metrics by 18% while supporting GDPR-aligned data handling. Delivered React and React Native applications for internal safety dashboards used by engineering and trust teams.
Delivered real-time recommendation systems with Node.js microservices and Python ML inference, increasing EU user engagement by 30% while meeting GDPR data-handling requirements. Built internal safety dashboards and infrastructure analytics with React/Next.js for compliance with EU content safety regulations.
Education· 10
Certifications and awards· 13
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